US1259800A - Head-mold for bottle-making machines. - Google Patents

Description

rrnn sTATEs PATENT Ormea..

WILLIAM sTENDE'n, OE MILWAUKEE, WISCONSIN, ASsIGNOR, BY DIRECT AND ASSIGNMENTS, To KNOX PATENTS COMPANY, INC., OE AUDUBON PARK, LOUISVILLE,

vIKENTUGKY.

HEADQMOLD ron EoTTLEI'uAi-{ING MACHINES.

specification or Leffersratenf. Patnfd Mal-19, 1918,

Appucationried April e, 1917. serial No. 159,053.

To ali whom t may Concern: f

Be it known that I, VILLIAM STENDEm Molds for Bottle-Making Machines; and

do hereby declare that the following is a full, clear, and eXact description thereof.

My invention relates to new and useful improvements in bottle making machinery and 1s directed morek particularly to thev vprovision of head ymolds for forming the neck mouths of the bottles preliminary to the blowing operationtherecf. Suchliead molds are usually formed in sections7V and a considerable. disadvantage heretofore encountered in such sectional molds is due to a Slight spreading Ofy the mold sections upon application of pressure incidental vto the molding operation, wherebyv objectionable side seams are formed due to the molten glass'entering the space between the mold sections. Also, a circular seam is formed at the juncture of the plunger and mold which is liable to cut the cork of the sealing cap and to also cut the brushes used in cleaning the bottles after they` are made.

It is primarily the object of my invention to prevent the formationl of such undesired seams on a bottle neckrand more particularly it is an object to provide-an arrangement whereby the'sectionsof the head mold are urged together upon molding pressure being applied thereto, and whereby a proper tightness of the forming plunger is assured upon entering the head mold to' thus provide an entirely smooth molding surface. n

A still further object resides in the provision of an' arrangement for effecting a smooth mold surface which doesnot interfere in any manner with the normally convenient operation of the head moldand associated parts.

A still further object resides in the provision of means for forming an annular groove in the mouth edge of the bottle neck whereby to forma double Contact arrangement adapted to engage the sealing cap more particularly in the manner shown in Patent No. 1,191.194 granted to Geo. F.

`KnoX July 18, 1916.

With the above and other objects and advantages in view, 'the invention resides more particularly in the novel combination, formation and arrangement of parts hereinafter described and pointed out `in the `appended claims. v

In the drawings l F'gure l is a vertical sectional view through my improved sectional head mold and associated parts including the form-ing plunger, which is shown in its inward limit of forming movement. Fig'. 2 is a top plan view of the mold. Referring now more particl'llarly to the' accompanying 'dra.vings,` v5 designates the usual block for holding the head moldin a bottle making machine, and in embodying my invention` this block is provided with a mold receiving recess 6'of inverted frustof conical Shape and is further provided with a plunger receiving bore 7 communieating with the bottom ofthe recess 6k and concentric therewith.

The mold comprises aA pair of seini-cir` cular sections 8 and y9 reslnectively,` and theseY sections when placed together are frusto-jconical in shapeto fit within the re# cess of the block and contact with the side walls thereofv in such manner that upon application of molding pressure to the mold sections, they will be forced together toA positively prevent l'the occurrence of *seamsl at the juncture of their end portions which might permit the formation of projections on the bottle neck. These mold sections are provided with the usual circums'cribingy grooves 10 in their sides tojpermit removal thereof by means of a suitable tool inserteddesired contour of the bottle neck, being suitably inset to define a ledge or shoulder 12 extending atk right angles to the axis of the 'mold whereby to form the outerportion of the annular end face of the bottle necln inner faces of the head mold and isfurther provided with a frusto-conical section 16 Y adapted to engage in the frusto-conical recess 13 of the head mold. This plunger terminates in a reduced extension 17 projecting into the upper portion of the mold to force the molten glass thereagainst and at the juncture of the section 17 and the frustoconical section 16 is formed a shoulder 18*` inward movement thereof with respect to the mold to thus insure proper alinement of the shoulders 12 and 18.

It is appreciated that the major pressure incidental to the molding operation is Vapplied to the head mold sections S and 9'to insure their wedging contact incidental to the bevel afforded by their frusto-conical shape in conjunction with the corresponding formation of' the receiving recess `6.

lVhat is claimed 1. In a bottle making machine, a centrally apertured two-part head mold, one end portion of said aperture being shaped to define the contour of a bottle neck and inset to define a shoulder for forming the outer portion of the end face of the neck, the othery end portion of said aperture being of substantially' frusto-conical shape, the taper of said other end portion being rearwardly and outwardly inclined, a forming plunger insertible into said aperture from said other end and including a frusto-conical portion en gageable with the shoulder of the mold to define the inner portion of the end face of the bottle neck,'a second annular shoulder on said plunger outwardly of the first named shoulder and adapted to abut the end of the head mold, and an annular rib on said annular shoulder of the lunger intermediate its edges whereby to de ne a groove dividing the end face of a bottle neck into outer and inner concentric portions, substantially as described.

2. In a bottle making machine, the combination with a holding block providedwith a central frusto-conical recess, the peripheral wall of which tapers inwardly and a bore communicating with the bottom of the recess and concentric therewith, of a plurality of mold sections coacting to yform an annular Copies vof this patent may be obtained for mold member, the outer peripheral edges of Vtheir adjacent end portions when inserted in the frusto-conical recess of the said block, andthe upper outer face of the assembled mold extending beyond the surface of the holding block whereby to procure the positive forcing together of the adjacent edges of the mold ,sections upon application thereagainst of molding pressure to prevent the occurrence Vof seams at the juncture of their end portions, substantially as described.

3. A bottle making machine comprising, in combination, a holding block provided with a frusto-conical recess and a bore com municating with the bottom of the recess and concentric therewith, the peripheral wall of said recess being inwardly inclined, a pair of semi-circular mold sections co-acting to form an annular mold member having a passage therethrough, one end portion of said passage being formed to define the contour of a bottle neck, the other end portion of the passage beingof substantially trusteeonical shape and in alinement with the bore of said holding block, the outer peripheral edges of said sections being inclined and curved to form a frusto-conical shape when assembled whereby to procure wedging abutment of their adjacent end portions when inserted in the truste-conical recess of the said block and the upper outer surface of the assembled mold being extended beyond thefsurface of the holding block whereby to procurethe forcing together of the adjacent edges of the mold sections upon the applica* tion thereagainst of molding pressureto prevent theoccurrence of seams at the juncture of the end portions, and a forming plunger insertible into the bore of said holding block `from the end opposite the frusto-conical recess `and including a frusto-conical section engageable with said frusto-conical portions of the passage in the mold member, substantially as described.

In testimony that I claimA the foregoing I have hereunto set my hand at Milwaukee, in the county of Milwaukee and State of Wisconsin, inthe presence of two witnesses.

WILLIAM srnnnnn.

Witnesses:

FRANK S. RA'rcLIrrE, M. E. DOWNEY.

five cents each, by addressing the Commissioner lo' Patents,

Washington, D. C.

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